DE69019391D1 - Gamma correction device. - Google Patents

Gamma correction device.

Info

Publication number: DE69019391D1
Authority: DE; Germany
Prior art keywords: correction device; gamma correction; gamma; correction
Prior art date: 1989-02-06
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired - Fee Related

Application number

DE69019391T

Other languages

German (de)

Other versions

DE69019391T2 (en

Inventor

Tsutomu Takayama

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Canon Inc

Original Assignee

Canon Inc

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1989-02-06

Filing date

1990-02-01

Publication date

1995-06-22

1989-02-06 Priority claimed from JP1025820A external-priority patent/JPH02206283A/en

1989-02-06 Priority claimed from JP1025819A external-priority patent/JP2696378B2/en

1990-02-01 Application filed by Canon Inc filed Critical Canon Inc

1995-06-22 Application granted granted Critical

1995-06-22 Publication of DE69019391D1 publication Critical patent/DE69019391D1/en

1995-10-26 Publication of DE69019391T2 publication Critical patent/DE69019391T2/en

2010-02-02 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/20—Circuitry for controlling amplitude response
- H04N5/202—Gamma control

Landscapes

Engineering & Computer Science (AREA)
Multimedia (AREA)
Signal Processing (AREA)
Picture Signal Circuits (AREA)
Processing Of Color Television Signals (AREA)

DE69019391T 1989-02-06 1990-02-01 Gamma correction device. Expired - Fee Related DE69019391T2 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
JP1025820A JPH02206283A (en)	1989-02-06	1989-02-06	Gamma correcting device
JP1025819A JP2696378B2 (en)	1989-02-06	1989-02-06	Non-linear processing unit

Publications (2)

Publication Number	Publication Date
DE69019391D1 true DE69019391D1 (en)	1995-06-22
DE69019391T2 DE69019391T2 (en)	1995-10-26

Family

ID=26363513

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DE69019391T Expired - Fee Related DE69019391T2 (en)	1989-02-06	1990-02-01	Gamma correction device.

Country Status (4)

Country	Link
US (1)	US5089890A (en)
EP (1)	EP0382100B1 (en)
CA (1)	CA2008690C (en)
DE (1)	DE69019391T2 (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP2924079B2 (en) *	1990-05-14	1999-07-26	ソニー株式会社	Gamma correction circuit
US5257108A (en) *	1990-08-06	1993-10-26	Koji Muraoka	Video signal processing circuit for improving contrast for an LCD display
GB2250886B (en) *	1990-12-13	1995-06-14	Rank Cintel Ltd	Noise reduction in video signals
US5196924A (en) *	1991-07-22	1993-03-23	International Business Machines, Corporation	Look-up table based gamma and inverse gamma correction for high-resolution frame buffers
DE4137373C1 (en) *	1991-11-13	1993-06-17	Siemens Ag, 8000 Muenchen, De
KR950005050Y1 (en) *	1991-12-05	1995-06-21	삼성전자 주식회사	Combined analog circuit of digital camera
JPH05191675A (en) *	1992-01-14	1993-07-30	Canon Inc	Gamma correction circuit and image pickup device using the circuit
JP3386495B2 (en) *	1992-09-14	2003-03-17	富士写真フイルム株式会社	Digital electronic still camera and control method thereof
JP3074967B2 (en) *	1992-10-27	2000-08-07	松下電器産業株式会社	High dynamic range imaging / synthesis method and high dynamic range imaging apparatus
JP3302423B2 (en) *	1992-12-28	2002-07-15	キヤノン株式会社	Imaging device
US5572256A (en) *	1993-07-20	1996-11-05	Kabushiki Kaisha Toshiba	Solid-state imaging apparatus
BE1007608A3 (en) *	1993-10-08	1995-08-22	Philips Electronics Nv	Improving picture signal circuit.
BE1007777A3 (en) *	1993-11-23	1995-10-17	Philips Electronics Nv	Non-linear signal.
KR0142263B1 (en) *	1994-08-06	1998-06-15	김광호	Digital gamma correction method and device
KR960028705A (en) *	1994-12-08	1996-07-22	이헌조	Color electroluminescent (EL) device and its manufacturing method
KR960024524A (en) *	1994-12-21	1996-07-20	김광호	Gamma Correction Device of Liquid Crystal Display Using Memory Device
JP3316351B2 (en) *	1995-09-27	2002-08-19	シャープ株式会社	AGC device
KR0185136B1 (en) *	1996-02-21	1999-04-15	김광호	VCR Image Clarity Enlarger
KR100206792B1 (en) *	1996-07-16	1999-07-01	구자홍	Device for improving tv picture quality by using gamma compensation
KR100386080B1 (en) *	1996-09-16	2003-08-21	주식회사 하이닉스반도체	Gamma Correction Device of Video Signal
RU2101874C1 (en) *	1996-12-10	1998-01-10	Йелстаун Корпорейшн Н.В.	Method of generation, monitoring and reception of television signal
EP0909515B1 (en) *	1997-03-06	2002-06-26	Matsushita Electric Industrial Co., Ltd.	Gamma compensation apparatus
JPH11143379A (en) *	1997-09-03	1999-05-28	Semiconductor Energy Lab Co Ltd	Semiconductor display device correction system and semiconductor display device correction method
US6633343B2 (en) *	2000-03-14	2003-10-14	Matsushita Electric Industrial Co., Ltd.	Dynamic gamma correction apparatus
KR100911815B1 (en)	2001-04-11	2009-08-12	엔엑스피 비 브이	Contrast control method, signal processing device, display device and computer readable medium
US7038721B2 (en)	2002-02-15	2006-05-02	Koninklijke Philips Electronics N.V.	Gamma correction circuit
JP4271978B2 (en) *	2003-04-18	2009-06-03	株式会社日立製作所	Video display device
JP4311166B2 (en) *	2003-11-05	2009-08-12	ソニー株式会社	Information signal processing apparatus and processing method, coefficient seed data generating apparatus and generating method used therefor, program for executing each method, and medium recording the program
US20180096641A1 (en) *	2016-09-30	2018-04-05	Himax Display, Inc.	Gamma improvement method and associated electronic device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3277318A (en) *	1964-04-30	1966-10-04	Gen Electric	Gamma correction circuits
JPS5230319A (en) *	1975-09-04	1977-03-08	Nippon Hoso Kyokai <Nhk>	Compensation circuit of digital type gamma
DE3107901A1 (en) *	1981-03-02	1982-09-16	Siemens AG, 1000 Berlin und 8000 München	DIGITAL REAL-TIME TELEVISION IMAGE DEVICE
US4394688A (en) *	1981-08-25	1983-07-19	Hamamatsu Systems, Inc.	Video system having an adjustable digital gamma correction for contrast enhancement
JPS5863989A (en) *	1981-10-13	1983-04-16	大日本スクリ−ン製造株式会社	Contrast correction of output data for digital image processor
JPS60139080A (en) *	1983-12-27	1985-07-23	Canon Inc	Picture forming device
GB8521019D0 (en) *	1985-08-22	1986-10-01	Rank Pullin Controls Ltd	Imaging apparatus

1990
- 1990-01-24 US US07/469,144 patent/US5089890A/en not_active Expired - Lifetime
- 1990-01-26 CA CA002008690A patent/CA2008690C/en not_active Expired - Lifetime
- 1990-02-01 EP EP90102028A patent/EP0382100B1/en not_active Expired - Lifetime
- 1990-02-01 DE DE69019391T patent/DE69019391T2/en not_active Expired - Fee Related

Also Published As

Publication number	Publication date
EP0382100A1 (en)	1990-08-16
DE69019391T2 (en)	1995-10-26
CA2008690C (en)	1994-12-27
CA2008690A1 (en)	1990-08-06
EP0382100B1 (en)	1995-05-17
US5089890A (en)	1992-02-18

Publication	Publication Date	Title
DE69019391D1 (en)	1995-06-22	Gamma correction device.
DE68917513D1 (en)	1994-09-22	Imaging device.
DE69017315D1 (en)	1995-04-06	Ostomy device.
DE3766653D1 (en)	1991-01-24	ENDOPHOTOCOAGULATION DEVICE.
KR890016552A (en)	1989-11-29	Code correction device
DE69231565D1 (en)	2000-12-21	Time base correction device
DE3781938D1 (en)	1992-11-05	TOUCH-ACTIVE DEVICE WITH IMPROVED LINEARITY.
DE3889283D1 (en)	1994-06-01	Imaging device.
DE69006923D1 (en)	1994-04-07	Imaging device.
DE69018921D1 (en)	1995-06-01	Adjustment device.
DE69121313D1 (en)	1996-09-19	Contrast correction device
DE69125869D1 (en)	1997-06-05	Gradation correction device
DE69008647D1 (en)	1994-06-09	Imaging device.
DE69018556D1 (en)	1995-05-18	Exposure device.
DE3767153D1 (en)	1991-02-07	DEVICE FOR LOCATION.
ES1009123Y (en)	1990-02-16	GYMNASTIC-RECREATIONAL DEVICE.
DE68903009D1 (en)	1992-11-05	SCINTILLATION DEVICE.
NO890446L (en)	1990-08-06	FORSKALING DEVICE.
DE68905853D1 (en)	1993-05-13	VENTILATION DEVICE.
DE69007711D1 (en)	1994-05-05	Imaging device.
DE3881892D1 (en)	1993-07-22	SLOT RADIOGRAPHY DEVICE.
DE68914725D1 (en)	1994-05-26	Location display facility.
DE59009545D1 (en)	1995-09-28	Image acquisition device.
DE69026508D1 (en)	1996-05-15	Linearity correction device
IT8982540A0 (en)	1989-05-05	KEEPING DEVICE.

Legal Events

Date	Code	Title	Description
1996-06-13	8364	No opposition during term of opposition
2009-12-17	8339	Ceased/non-payment of the annual fee